IN Brief:
- Construction has started at the 24.2MWp Castellammare photovoltaic development in Sicily.
- SIREOS holds the engineering, procurement and construction contract, and Crédit Agricole is providing financing.
- Qair is targeting commercial operation in July 2027 while developing additional Italian renewables and battery projects.
Qair has begun construction of the 24.2MWp Castellammare photovoltaic project in Sicily, following an engineering, procurement and construction contract with SIREOS and a financing agreement with Crédit Agricole. The developer expects the installation to enter commercial operation in July 2027. The new construction phase follows project development and financing, with the next delivery work involving the photovoltaic arrays, power-conversion equipment and grid connection.
Castellammare’s 24.2MWp rating specifies the nominal peak output of its photovoltaic modules under standard test conditions. Electricity will first be generated as direct current and converted through inverters to alternating current for delivery to the connected network. The actual AC export limit depends on inverter and connection specifications, neither of which Qair has published for this project. Energy production will vary with irradiance, temperature and equipment availability, and the company has not supplied an annual gigawatt-hour forecast.
SIREOS is responsible for the contracted EPC scope, combining design work, procurement and site construction. The financing agreement with Crédit Agricole provides a separate commercial foundation for the scheme’s delivery. As construction progresses, the contractor must align material deliveries and equipment installation with access to the site and the electrical integration sequence. Qair has given July 2027 as its commercial-operation target but has not published an intermediate programme for module deliveries, first energisation or the final acceptance tests.
A utility-scale solar installation brings together photovoltaic modules, mounting structures, electrical cabling, inverters, transformers and protection equipment. Modules generate direct current, while grid-connected systems typically use power electronics to convert that output into alternating current suitable for the connected network. Equipment specifications and the final system configuration must match site conditions and applicable grid requirements. The Qair release does not identify the module manufacturer, inverter supplier, mounting arrangement or connection voltage, so none can yet be assigned to Castellammare as a verified project fact.
The installation sequence links civil and electrical work. Ground preparation and mounting structures precede module placement, while collection cabling and inverter stations connect the generating arrays to the plant’s grid interface. Once installed, the system will need insulation, earthing and protective-function checks, alongside validation of the inverters’ response to grid conditions. The project information does not specify its connection voltage or the detailed equipment layout. Those items will determine the exact test and commissioning sequence before the targeted July 2027 operation.
Qair’s Italian development portfolio extends beyond Castellammare. The company reports approximately 1.5GW across wind, solar and renewable hydrogen projects, as well as an advanced pipeline of 2.3GWh of battery storage. The portfolio figures describe developments at different stages rather than assets all producing electricity today. Battery storage is reported in megawatt-hours because energy capacity is the relevant measure, while photovoltaics are identified by peak module power. Project-level connection ratings and delivery dates have to be established separately.
Qair has operated in Italy since 2019 and maintains offices in Milan and Potenza. Its existing operating assets include a 12.5MW wind farm at Garessio in Piedmont and a 9MW solar plant at Marrubiu in Sardinia. The company also identifies a proposed 54MW solar development at Montalto di Castro in Lazio. These projects are at different stages, with Castellammare entering construction, Garessio and Marrubiu already operating, and the Lazio project described as part of the ongoing development programme.
Qair links its planned Italian battery developments to network congestion, which can restrict how much solar and wind generation is exported at certain times. Storage can absorb electricity during charging periods and discharge it later, provided the electrical connection and operating arrangements permit. No storage system has been specified for Castellammare in the 5 November construction update. Its 24.2MWp solar development should therefore be assessed on its own confirmed generating scope, without assuming the battery projects elsewhere in the portfolio will be installed at this site.
Across its international business, Qair reports 1.7GW of operating renewable capacity, more than 1GW under construction or financing, and a further 28GW under development. These totals cover different countries and technologies and sit outside the project-specific figure for Castellammare. In Italy, the company already operates wind generation at Garessio and solar generation at Marrubiu, while a 54MW solar development at Montalto di Castro forms part of the planned pipeline. Construction at Castellammare will add another project to the group’s Italian delivery programme.
The remaining milestones at Castellammare include installation of the generating and conversion equipment, completion of the grid interface, and electrical testing before commercial operation. SIREOS holds the identified construction contract, with financing arranged through Crédit Agricole and a July 2027 target set by Qair. Confirmation of first energisation and commissioning will establish whether the 24.2MWp installation has progressed according to that programme.
